Homogeneous-flat
High heat and impact bebop have started to be weakened with development of a cool jazz. Since the end 1940 and in the early fifties years musicians have started to develop less furious, more smooth approach to the improvisation, simulated on an image of light, dry game of the tenor saxophonist of Leicester Young which it applied in a swing. The released and is homogeneous-flat sound leaning on emotional «cooling» became result. Trumpeter Majlz Devis who was one of the first executors who “has cooled” it, became the greatest innovator of this genre. It nonet, the written down album «the Birth of cool» in 1949-1950 was an embodiment of lyricism and restraint of a kul-jazz. Other known musicians of kul-jazz school are trumpeter Chit Bejker, pianists George Shiring, John Lewis, Dejv Brubek and Lenni Tristano, Milt Jackson and saxophonists of Sten Getts, Whether Konits, Zut Sims and Pol Desmond. Arrangers also have brought the considerable contribution to kul-jazz movement, especially Ted Dameron, Claude Tornhill, Bill Evans and a baritone-saxophonist of Dzherri Malligen. Their structures have concentrated on tool colouring and slowness of movement, on the fallen asleep harmony which created open space illusion. The discord also played some role in their music, but differing thus softened, muffled character. The kul-jazz format left space for big on structure of ensembles during this period became more habitual, than in early bebop. Some arrangers experimented the changed instrumentation, including cone-shaped copper wind instruments, for example a French horn and a tuba.